The Matis people (also called Matsë in their own native language) are an indigenous people of Brazil. Outsiders sometimes call them the Jaguar People, but they do not like the name. They currently liv
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee19d23f3bbae8cb416a9088a1baed1febb784cc5ce980242b2a85f81950903. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25f7efcb-56cb-4d4a-8b7b-f406746905f5.json and https://artists.proofprofile.net/proofs/artist/25f7efcb-56cb-4d4a-8b7b-f406746905f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56746104779ba736d9cd020f5cd3ed3f3ad71c5ba88b8db837661d1a1c589595. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2300666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5921a92ec486ece976cc812c226a30261e5e2138f61b3b6ab23b90989290a8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2300672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff7afbfce7a195ee033f99d7ff8f1d50c56399e1040f5fd8b5c91a7243a1a8b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2300677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292efe318329a580c9602f6d634af61a4f38bc48f8ef80811efd13e774d98473. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2300667.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf8dec6fe82e250c45dc1b8f1a25991fc40c7dff91859141cdccf149d2e2636. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2300668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a848348bf506a017323fa08f2120d12b5361b57e145574ca4db1cb1ea4aa45c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2300675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2199790747e9dea9cebbc8b227a8fae0a44ee95c6b987987dd7971a6e63bd8. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2304379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3353b09cc5dab8092347a212aadb01eecf7c33dc80993a785762946b6e432f09. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2405275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe219a572eb44b71ad5bd81a78a0a00068ddaedf3c01a2c12b3d5e60df1f20d36. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2405276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f462f38e5b43de0aaf268cf7ba99ebe9a06a0b0d16ec16932177f3607a26a0a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2405238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d5ed82c1b6c27e4cdb69b937065ebcf8949659edd5f9d4739cd37ea301e987. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:29:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2405240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d914cce8e3c75edfd24c8f09ce18734d6f1e84392e240277883a6826c6c305. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2405273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc750a6fafda515d922afb40cbbe97c16ce1089a3fe0118f7057688efbf5dcc90. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2405274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f144ccdc59b0b7eee56c4ebea530ebf0eec544050c687461a1b67fd270c1c93. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2405277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a41187c8a6fb925c921c839a3dd8c317f9965f35ebc51cd2aedb61a6be653ec. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2405278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12825820ca9a4cc3e535489eb8eb47b700cb094e098561f833d8e2d28dcd5dda. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2405279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0313a04fceeb8a66febf07354f653a6f33d0e47b0398de6b8fa5e540c8bb75a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL31T2415509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58728695e1453cefd4fc34532bbf082aabf821be824228736c647d714f22b93f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL25M2500114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9709003b588e95d14b90be4bdc29e8c89ef53140f29a9596999616b92769e1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH442000051.